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 ###Instrução: Qual é a população onde a renda média das famílias é de $87,832 e há menos de 64,886 domicílios?
 ###Tabelas: CREATE TABLE mma_record (mma_record_id AUTO_INCREMENT PRIMARY KEY, Res. VARCHAR, Record VARCHAR, Opponent VARCHAR, Method VARCHAR, Event VARCHAR, Round INT, Time VARCHAR, Location VARCHAR) CREATE TABLE tennessee_counties_ranked_by_per_capita_income (tennessee_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE radio_series (radio_series_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Episode INT, Performer 1 VARCHAR, Performer 2 VARCHAR, Performer 3 VARCHAR, Performer 4 VARCHAR) CREATE TABLE main_issuers (main_issuers_id AUTO_INCREMENT PRIMARY KEY, Currency VARCHAR, Country VARCHAR, Generic Name or Nickname VARCHAR, Rating ( S&P / Moodys ) VARCHAR, Negotiable debt at mid-2005 ( US dollar bn equivalent) INT, Government financial liabilities as % of GDP (end 2003 - source : OECD ) VARCHAR, Issuer VARCHAR, Internet site VARCHAR) CREATE TABLE winners_by_country (winners_by_country_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Total INT, Marathon (men's) INT, Marathon (women's) INT, Half Marathon (men's) INT, Half Marathon (women's) INT)  
SELECT AVG Population FROM tennessee_counties_ranked_by_per_capita_income WHERE Median household income = $87,832 AND Number of households < 64,886